Ultrasaurus (ultra-sawr-us) was a genus of sauropod dinosaur that lived in the Aptian and Albian Ages during the Early Cretaceous Period, 100 to 110 million years ago. It was one of the largest dinosaurs to ever walk the Earth.
Ultrasaurus was enormous and measured 90 feet (27 metres) in length. Its tall front legs reached a height at the shoulder of perhaps 25 feet. It was heavy-bodied and weighed around 80 tons, twice as much as other sauropods. Ultrasaurus had a extremely long neck which could reach nearly 60 feet above the ground and a small head. Ultrasaurus was quadrupedal and walked on all 4 thick, trunk-like legs. Its fore legs were longer than its hind legs which gave it a giraffe-like body structure. The tail was small and short compared to the tails of other diplodocids.
Ultrasaurus was a herbivore and ate prehistoric plant material. It would have had to eat huge amounts of vegetation to sustain its great size. It ate leaves and needles of conifers and tree ferns and any other plant it could reach. Ultrasaurus fed almost constantly, probably always moving to search for food.
Unenlagia (oon-en-lahg-ee-ah) was a genus of theropod dinosaur of the family Dromaeosauridae. It lived in the Turonian – Coniacian Stages, during the Late Cretaceous period, around 94 – 86 million years ago in Argentina, South America. Unenlagia is the most bird-like dinosaur discovered so far. It was a member of the strange and extremely bird-like Gondwanan sub-family of dromaeosaurs called unenlagiines, and was closely related to dinosaurs such as Buitreraptor and Neuquenraptor (which might be the same species as Unenlagia).
Unenlagia had an small, elongated head with a beak that contained rows of small sharp teeth. It had a feather crest on top of its head and a flexible neck. On each foot, it had 3 toes which were equipped with large, sharp claws. Unenlagia was an omnivore and would have fed up on prehistoric plant material, insects and small reptiles and mammals.
Perhaps these proto-wings were used for balancing, turning, and a bit of lift during high-speed running. Although there is no fossil evidence of feathers from Unenlagia, it may well have had them, further adding lift to each upstroke of the proto-wings.
Emily Willoughby (email@example.com, http://emilywilloughby.com), CC BY-SA 3.0, via Wikimedia Commons
|Lived:||Early Cretaceous, 112 – 100 million years ago|
|Length||6m / 19.6ft|
Utahraptor (YOO-tah-RAP-tor) is the largest known member of the theropod dinosaur family Dromaeosauridae. It lived in the Albian age, during the Lower Cretaceous period, 132 to 100 million years ago, in Eastern Utah, USA. It is thought that Utahraptor may be closely related to the smaller Dromaeosaurus and the giant Mongolian dromaeosaurid Achillobator.
The attack of the Utahraptors – a group of hungry Utahraptors stalk and attack a group of herbivorous Iguanodons.
Utahraptor measured 23 feet (7 metres) in length, 6 feet (1.7 metres) in height and weighed around 1 ton. Like other dromaeosaurids, Utahraptor had a huge, powerful, curved claw on the second toe that could grow to almost 9 inches (23 centimetres) long. Utahraptor relied more on its hooked, slashing claw to maim its prey rather than using it jaws and teeth like a typical carnivorous predator. Its toe joints were specially enlarged so that its massive claw could be raised upward and backward to avoid damage while running. However, when used in an attack, its claw flexed forward as the dinosaur kicked out.
Last Updated on 06/07/2021 by admin